| adjective | invulnerable to fear or intimidation “audacious explorers” |
| adjective | unrestrained by convention or propriety; ; ; - Los Angeles Times; ; ; - Bertrand Russell “an audacious trick to pull” |
| adjective | disposed to venture or take risks “audacious visions of the total conquest of space” |
| audacity | noun | fearless daring |
| audaciousness | noun | fearless daring |
| braveness | noun | a quality of spirit that enables you to face danger or pain without showing fear |
| dauntlessness | noun | resolute courageousness |
| fearlessness | noun | feeling no fear |
| intrepidity | noun | resolute courageousness |
| brass | noun | impudent aggressiveness |
| brazenness | noun | behavior marked by a bold defiance of the proprieties and lack of shame |
| insolence | noun | the trait of being rude and impertinent; inclined to take liberties |
| venturesomeness | noun | the trait of being adventurous |
| venture | noun | an investment that is very risky but could yield great profits |